fread

PHP 文件打开/读取

由 只愿长相守 提交于 2019-12-16 21:58:05
PHP Open File - fopen() 打开文件的更好的方法是通过 fopen() 函数。此函数为您提供比 readfile() 函数更多的选项。 在课程中，我们将使用文本文件 "webdictionary.txt"： AJAX = Asynchronous JavaScript and XML CSS = Cascading Style Sheets HTML = Hyper Text Markup Language PHP = PHP Hypertext Preprocessor SQL = Structured Query Language SVG = Scalable Vector Graphics XML = EXtensible Markup Language fopen() 的第一个参数包含被打开的文件名，第二个参数规定打开文件的模式。如果 fopen() 函数未能打开指定的文件，下面的例子会生成一段消息： 实例 <?php $myfile = fopen("webdictionary.txt", "r") or die("Unable to open file!"); echo fread($myfile,filesize("webdictionary.txt")); fclose($myfile); ?> 提示： 我们接下来将学习 fread() 以及

Emlog显示评论者IP地理位置

由 可紊 提交于 2019-12-14 19:44:41
教程简介 为你的评论区加入 已评论者的IP地理位置显示 也不算什么有用的功能 想为你的博客加上这个小功能的 那就继续阅读哦 不想加的右上角X 不废话了 直接开始吧 第一步 你的模版/module.php增加如下代码 <? php //评论IP显示 function convertip ( $ip ) { $dat_path = EMLOG_ROOT . '/ip.dat' ; //*数据库路径*// if (! $fd = @fopen ( $dat_path , 'rb' )){ return 'IP数据库文件不存在或者禁止访问或者已经被删除！' ; } $ip = explode ( '.' , $ip ); $ipNum = $ip [ 0 ] * 16777216 + $ip [ 1 ] * 65536 + $ip [ 2 ] * 256 + $ip [ 3 ]; $DataBegin = fread ( $fd , 4 ); $DataEnd = fread ( $fd , 4 ); $ipbegin = implode ( '' , unpack ( 'L' , $DataBegin )); if ( $ipbegin < 0 ) $ipbegin += pow ( 2 , 32 ); $ipend = implode ( '' , unpack ( 'L' ,

fread() reading from a descriptor based on a pipe sets error, not EOF where there is no data

由 纵然是瞬间 提交于 2019-12-14 01:24:19
问题 I need to read with fread() the stuff from the read end of the pipe. But while i expect the fread() to set EOF when there is nothing in the pipe, it instead sets the error indicator. I have checked the posix and C standards and found no clue there. Probably i'm doing something unintended (read, silly), right:) Here's the excerpt: #include <stdio.h> #include <fcntl.h> int main() { char buf[128]; FILE *f; int pipe_fd[2], n; pipe(pipe_fd); fcntl(pipe_fd[0], F_SETFL, O_NONBLOCK); f=fdopen(pipe_fd

append multiple large data.table's; custom data coercion using colClasses and fread; named pipes

由 折月煮酒 提交于 2019-12-13 12:03:41
问题 [This is kind of multiple bug-reports/feature requests in one post, but they don't necessarily make sense in isolation. Apologies for the monster post in advance. Posting here as suggested by help(data.table). Also, I'm new to R; so apologies if I'm not following best practices in my code below. I'm trying.] 1. rbindlist crash on 6 * 8GB files (I have 128GB RAM) First I want to report that using rbindlist to append large data.tables causes R to segfault (ubuntu 13.10, the packaged R version 3

Reading unknown number of structs from file - C

由 ⅰ亾dé卋堺 提交于 2019-12-13 07:28:05
问题 I'm having a bit of trouble getting my program to read in data from a file. The issue is that the file is currently empty. Each time the program is run, a single array of books[] will be populated and written to the file later on in the code. While I'm sure it will work when all 10 structs are in the file, at the moment it's crashing since the file is empty and it's trying to read in 10 structs. Is there a way to read in an unknown number of structs (up to 10) from the file? struct stock {

fread issue with Stream Context

由 匆匆过客 提交于 2019-12-13 07:15:34
问题 I am sending iOS notification and in response from apple server checking if there was some error by using fread() but the code gets stuck in some loop or just loading and loading. Couldn't figure out the reason. $apnsHost = 'gateway.sandbox.push.apple.com'; $apnsCert = 'j_.pem'; $apnsPort = 2195; $apnsPass = ''; $notification = "hey"; $streamContext = stream_context_create(); stream_context_set_option($streamContext, 'ssl', 'local_cert', $apnsCert); stream_context_set_option($streamContext,

fread string of dynamic size from a binary file

由 三世轮回 提交于 2019-12-13 05:17:54
问题 I need to know how to read a string from a binary file using fread (). Thing is, as I understand, if I want to copy the value of some string to a new string declared like this: char *string; I need to calculate first the length of the other string using strlen () , use that value to reserve memory for my new string with malloc , and then copy the value o the other string to my new string using strcpy () Kinda like this: newLength = strlen ( otherString ) + 1; string = malloc ( sizeof ( char )

PHP to read & parse big sized file? [closed]

由 白昼怎懂夜的黑 提交于 2019-12-13 03:56:11
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I am about to read a text file sized 200Mb and then edit something inside and then to save it back. But i'm having errors. So: Which exact settings should be modified in php? Also what file reading method is the

How can I set time out for fread when access socket?

由 和自甴很熟 提交于 2019-12-13 01:28:57
问题 The following is my code. I wish fread can return when there don't have data to read after some seconds. I called stream_set_timeout. But it don't work. And I called stream_get_meta_data too. It don't give my need yet. I am connecting chat.facebook.com. $fp = fsockopen($server, 8888, $errno, $errstr); stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT); fwrite($fp, $xml); stream_set_timeout($fp, 5); $str = fread($fp,8192);//This code will hang when there don't have data to

Reading labview binary files in Matlab?

由 别来无恙 提交于 2019-12-13 00:35:16
问题 I have large .bin files (10GB-60GB) created by Labview software, the .bin files represent the output of two sensors used from experiments that I have done. The problem I have is importing the data into Matlab, the only way I have achieved this so far is by converting the .bin files to .txt files in Labview software then Importing the data into MATLAB using the following code: Nlines = 1e6; % set number of lines to sample per cycle sample_rate = (1); %sample rate DECE= 1000;% decimation factor
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